Earthships

An earthship is a passive solar home made of natural and recycled materials. It uses tires as permanent forms for rammed earth, has a passive solar design, rain catchment, and other integrated systems to create low-impact, energy-efficient structures. The are off-the-grid homes, minimizing their reliance on public utilities and fossil fuels.
They were designed and marketed by "Earthship Biotecture of Taos" and some of them are open for the public to visit and learn.